Means for mounting worm-gearing in milling-machines.



PATENTED 0011318, 1904. GROENE.

' R. K. LE BLOND & w. P.

MEANS FOR MOUNTING WORM GEARING IN MILLING MACHINES.

APPLIOATION FILED 0OT.4, 1902.

2 SHEETSSHE ET 1.

N0 MODEL.

' arwentow/ wi-fuaooea 1%. 772,894. PATENTED OCT. 18, 1904. v R. K. LE BLOND & w. P. GROENB. MBA s FOR MOUNTING WORM GEARING IN MILLING MACHINES.

APPLICATION FILED OUT. 4, 1902.

2 SHEETS-SHEET 2.

I nuamtou I K/Q W attorney;

UNITED STATES Patented October 18, 1904.

PATENT OFFICE.

RICHARD K. LE BLOND AND- WILLIAM F. GROENE, OF CINCINNATI, OHIO, ASSIGNORS TO THE R. K. LE BLOND MACHINE TOOL COMPANY, OF CINCINNATI, OHIO, ACORPORATION OF OHIO.

MEANS FOR MOUNTING WORM-GEARING IN MILLING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 772,894, dated October 18, 1904.

Application filed October 4, 1902.

To all whom it may concern: Be itknown that we, RICHARD K. LE BLOND and WI LIA F. GROENE, citizens of the United States, residing at Cincinnati, in the county of Hamilton and State of Ohio, have jointly invented certain 'new and useful Improvements in Means for Mounting Worm- Grearing in Milling-Machines, of whichthe following is a specification.

Our invention relates to milling-machines, and has for its object the providing of a machine of that character with novel and improved means for rotating the work compris ing a spiral and dividing-headof novel construction for permitting ready-dismantling of the same, novel adjustment and mounting for the worm-shaft for taking up wear of the parts, novel and economical means for dividing the work into large divisions when desired, novel means for clamping the shell to its support, and peculiar construction and mounting of the gearing between the feed-- screw of the table and't'he work-supporting quill; and our, invention consists in the parts and in the construction, arrangement, and combinations of parts hereinafter more fully described and claimed.

In the drawings, Figure 1 is a side elevation of our improved device. Fig. 2 isa rear end elevation'of the same. Fig. 3 is a sectional detail on the line of'Fig. 2, showing the gears on the quick-return stud-shaft. Fig. 4c is a sectional detail on the line 41 o of of Fig. 1, showing the transmittinggearing at the side of the shell for the worm-shaft. Fig. 5 is a perspective view of the shell-clamping shoe. Fig. 6 is a central vertical longi tudinal section of the spiral and dividing-head of ourimproved device. Fig. 7 is a front end elevation of the same, partly in section, on the line 00 m of Fig. 6, with the gear-cover for the w0rmwheel removed. Fig. 8 is a perspective view of the worm-sleeve, and Fig. 9 is a sectional detail of the shell-clamping mechanism on the line y y of Fig. 6. v

1 represents the table of amilling-machine,

which is adapted to be 'reciprocated on the Serial No. 125,867. (Nb model.)

ing a flange 7. The gear 4 is of bell shape,

as shown at 8, for accommodating the bearing 6. It hasa hub 9, on which a change-gear 10 is secured, preferably by keying, and a milled'nut 11. The outer end of the studshaft receives a handle'12 for turning the stud-shaft and the gears mounted thereon. The change-gear 10 communicates with a series of change-gears operating the work to be turned or cut, as will be presently described. Asthe work is fed by the feed-screw, which is normally driven by power through suitable gearing not necessary to show, motion is imparted to the change-gears through the pinion 3 and gear 4. The gear 4 is substantially larger than the pinion 3 and being secured to the stud-shaft, which is turned directly by the handle, is capable of returning the work quickly to its initial position for advancement by the dividing-head for the next cut.

The'change-gear 1O communicates motion to a bevel-gear 16 on a shaft 17, journaled in a bearing 18, through the medium of a series of change-gears 19. The bearing 18 is located on a bracket 20, secured to a support 22 of the spiral head-shell 23. Bolts 2 1 securesupport 22 to the table. The change-gears 19 are mounted on a stud or studs 25, secured in a slot or slots 26 of a swinging arm 27,- and communicate motion to gear 13 on shaft 1 1, journaled in bearing 15 on the bracket, the shaft 14 having a gear 1 1' meshing with gear 17 on shaft 17. The swinging arm is pivoted about the bearing 15 on a split bearing 28 and clamped thereto by a clamping-bolt 29 in suitable position. The change-gears communicate director reverse rotation to the shaft 17 at different speeds, according to thenumber and size of change-gears employed, and are adapted to be thrown out of gear with the feed-screw by swinging the arm 27.

The bevel-gear 16 meshes with a bevelgear 35, journaled on a stud 36, secured to the shell 23. The hub of the bevel-gear 35 has secured to it a gear 38, meshing with a transmittinggear 39, mounted on a stud 40, also secured in the shell. The gear 39 meshes with a gear 41 on a sleeve 42, slipped over one end and loosely journaled on a sleeve 43. The sleeve 42 has secured to it the index-plate 44 of the dividing-head, and the worm may thus be driven, under desired conditions of work, by the gear 41, the index-plate, and pin 79, to be described.

The sleeve 43 serves as abearing for a wormshaft 45 of a worm 46 The worm-shaft is mounted eecentrically and longitudinally of the sleeve 43. The latter sleeve is rockingl y mounted in an extension 50 of the shell. The sleeve 43 also has a lug 51, having a slot 52 concentric with the bearing 53 ot' the sleeve. A bolt 54 takes through the slot into the extension and clamps the sleeve in suitable position about its axis.

The worm meshes with a worm-wheel 55 on aquill 56, in which the head-center, the faceplate, or other suitable work-attaching device may be secured. The worm-wheel 55 may be keyed to the quill and a milled nut 57 em ployed to hold the worm-wheel on the quill, a gear-cover 58 being interposed between the nut and worm-wheel and being removable with the latter. The worm being eccentrically mounted in the sleeve 43 may be readily thrown into or out of mesh with the wormwheel by turning the sleeve 43 in its bearing. The Worm meshes with the wormwheel through an opening 59 in the sleeve 43. An adjusting-bolt 6O screws into the end wall of the slot 52 and is used to regulate the position of the worm relatively to the wormwheel, so that any lost motion due to wear can be taken up.

The worm-shaft 45 is secured in the sleeve 43 in such a manner as to permit its ready removal and adjustment. One of its journals, 61, is of a diameter at least as large as the worm, the other journal, 62, being of smaller diameter. 111 this manner two full journals are provided for the worm-shaft, one on each side of the worm, with both journals having bearings in the sleeve. The worm-shaft is secured against endwise movement by having a nut 63 screwed on the end of the shaft, with washers 64 65, the reduced bearing 66, and a collar 67 between the nut and the end of the worm 46. The nut and collar take about a reduced-extension of the reduced journal 62, with the reduced journal longer than the length of the reduced bearing for permitting screwing up of the nut 63 for taking up endwise play of the worm-shaft. Means are thus provided for taking up wear between the worm and worm-wheel both laterally and longitudinally of the worm-shaft.

The worn'i-gearing for the spiral head is so constructed that it may be easily dismantled for interchangeability of parts. It it is desired to dismantle the worm-gearing ol the spiral head, the sleeve 43 is rocked in its bearing, which throws the worm out of mesh with the worm-wheel, and the worm-wheel is slipped oil of the end of the quill. The bolt 54 is removed and the sleeve 43 slipped out of its bearing longitiulimtlly. It itis desired to remove the worm-shalt from the sleeve 43, the nut 63 is removed, which permits the worm-shaft and worm to be slipped longitudinally out of the sleeve.

The quill has a tapered journal 70 and a. straight journal Tl, having their bearings in the shell. The worm-wheel is secured to one end of the quill and is located outside ol' the bearings of the quill in the shell. The other end of the quill has a spanner-nut 7Q, serewing thereon for securing the quill against endwise movement. A washer 73 may be intel-posed between the nut and shell.

It will be seen that the quill may be readily removed from the shell without dismantling the worm-shaft, the latter being readily thrown out of mesh with the vormwheel by reason of its eccentric mounting, and that the worm-shaft may be readily removed from the head without dismantling the quill, with the worm-shaft itself readily removable from its sleeve, making a convenient and simple construction which is compact and powerful and advantageous in constructing the parts for interchangeability.

hen the spiral out has been made in the work, the carriage and the work are quickly brought back to their initial position by turning the feed-screw in the reverse direction by means of the handle 12. \Vhen brought back to its initial position, the work is advanced on its axis by means of the dividing-head, the index plate 44 of which is secured to the sleeve 42, usual forks T6 77 being provided lorgnidance in setting the work to its new position, the handle 78 having a pin 7f) adapted to be placed in selective holes 80 of the index-plate.

The index-plate may be held rigid with relation to the shell (the change-gears being thrown outof operati ve engagement) by means oi a pin 81, slidable longitudinally in the stud 40, the pin projecting into the holes at the rear of the index-plate. The pin 81 is adjustable in the bore, so as to engage the holes or be out of range therewith, and may be secured in the bore by means oi a suitable setscrew. lVe have also provided convenient and economical means for rotating the quill in case it is desired to divide the work into large divisions. In order to accomplish this,

we have provided the worm-wheel with a series of apertures 86, into which a pin 37 takes. The pin 87 has a hollow shank 88, provided with a rack 89, a pinion 90 on a rock-pin .ll

- at an angle to the horizontal.

.wormwheel.

engaging with the rack for throwing the pin 87 out of engagement with the holes in the A handle 92 isprovided for manipulating the rock-pin. A spring 98 is located in the bore of shank 88, one end resting against the shank and the other againsta pin 94, urging the pin 87 outward into engagement with the holes 86.

The quill may be firmly clamped with rela- The shell is provided at its ends with annular grooves 101 101, having tapered faces 102 102. The periphery of the shell is provided with turned engaging faces 103 103', adapted to contact with correspondingly-turned engaging faces 104 1045 on the shell-support;

The shell-support is provided with'apertures' through which bolts 107 107 are adapted to take. The bolts have shoes 109 109' at their ends. The shoes have tapered faces 111 111, which are also turned on circles corresponding to the circles of the annular grooves 101 101" and the tapered walls of those grooves. Each of the bolts has a nut 113. When the nuts are screwed on their bolts, they force the shoes 109 109' toward each other and clamp the shell to its support, drawing the shell toward its support, and also centering the shell on its sup port, producing accuracy in the work performed by firmly securing the shell in proper position irrespective of the angle to which the quill may be thrown. that the various faces of the setting and clamping devices for the shell are turned to circles, making an economical construction and as: suring accuracy.

We claimi 1. The combination of a shell and itsquill, a worm-wheel connected to the quill, said shell being provided with a sleeve, a worm eccentrically mounted in the sleeve, said sleeve hav ing a slotted lug at one end, and means for engaging the slotted lug to adjust the rotary movement of the sleeve.

2. The combination with the shell, its quill,

. andthe worm-wheel therefor, of a-rockable centric with the bearing of the sleeve, and a" bolt to engage said slot to clamp the sleeve in adjusted position.

3. The combination with-the shell having a It will be further seensideextension or hearing, the quill, a worm-' wheel detachably connected to the end thereof, a rockable sleeve fitted, interiorly of said extension and having a bearing therein substantially the length of the sleeve, said sleeve having'a side opening, a shaft eccentrieally mounted inthe sleeve and provided with'a g worm adjacent said side opening in the sleeve to b'eth rown into and out of engagement with the worm-wheel, said shaft having a bearing at one end in the sleeve as large as the worm on the shaft, whereby when the worm is disengaged from the worm-wheel by rotation or rocking movement of the sleeve in the extension said shaft may be removed endwise-from the sleeve.

4. The combination of the shell and its quill, a worm-wheel detachably secured to the end of the quill, said shell having an extension, a sleeve fitted to rock in said extension and having a bearing substantially the length thereof,

said sleeve being provided with a lug at one end, and means to engage said lug to determine the rocking adjustment of the sleeve, a shaft eccentrically mounted in said sleeve and having a worm to be thrown into and out of engagement with said worm-wheel, said shaft having a bearing at one end in the sleeve as large as the worm, whereby upon disengagement of the Worm from the worm-wheel and the removal of the latter from the quill the said sleeve containing the shaft and worm may be removed end wise from the extension, and

thereafter the shaft and worm be removed sleeve, a journal for the shaft at one side of the wormof a diameter sufiiciently large to permit the worm to pass longitudinally therethrough, and a journal for the shaft at the other side of the Worm of smaller diameter than the Worm, and having its bearing in the sleeve, whereby the shaft and worm may be removed from the integral sleeve,'while the sleeve is still in position in the shell.

6. v The combination, with the shell, itsquill and worm-wheel therefor, of an integrallyformed sleeve rockably mounted on the shell and a worm-shaft eccentrically journaled in the sleeve, a. worm thereon, a'journal for the quill and the Worm-Wheel thereon, of a rocknames hereto in the presence of two subscribable sleeve having a slotted lug, a Worm-shaft, ing Witnesses. a Worm eeeentrically gournaled thereon, means i W I on the shell engaging the slotted lug for ad- 5 justably limiting the rocking movement of I l T x i the sleeve, and means for permitting longi- \Vitnesses: .tudinal adjustment of the shaft in the sleeve. MASON P. PRI'ICHARD,

in testimony whereof we have signed our AUGUST F. l'lABSLE'l. 

